diff --git a/build.sbt b/build.sbt
index f9f8877..60d9ad3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -8,6 +8,9 @@ libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.7" % "test"
 libraryDependencies += "org.typelevel" %% "cats-effect" % "1.3.0" withSources() withJavadoc()
 libraryDependencies += "com.github.scopt" %% "scopt" % "4.0.0-RC2"
 
+libraryDependencies += "co.fs2" %% "fs2-core" % "1.0.4"
+libraryDependencies += "co.fs2" %% "fs2-io" % "1.0.4"
+
 scalacOptions ++= Seq(
   "-feature",
   "-deprecation",